How do you remove number 4 fuel injector on 2002 3.8 liter ford windstar?

To remove the number 4 fuel injector on a 2002 3.8-liter Ford Windstar, first, disconnect the negative battery terminal to ensure safety. Then, remove the intake manifold, as access to the fuel injectors is limited. Once the manifold is off, disconnect the electrical connector from the injector and the fuel line. Finally, use a socket or wrench to remove the retaining clip and pull the injector out from the fuel rail.